Process for drawing sheet-glass.



No. 840,838. PATENTED JAN. 3, 1907. J. GEORGE & 0. M SHORTLE. PROCESS FOR DRAWING SHEET GLASS.

APPLIUA'I 'ION FILED AUG.19. 1904.

2 SHEETS-SHEET 1.

- No. 840,838. PATENTED JAN. 8,1907;

J. GEORGE & 0. M. SHORTLE.

PROCESS FOR DRAWING SHEET GLASS; APPLIOATIOK FILED Aim. 19, 1904.

Z, 2 SHEETS-SHEET 2 Jwe 12 0735.

rrnn s'rnrns Pi rENr OFFICE.

JAPHUS GEORGE, OF 'ILCOX, PENNSYLVANIA, AND CHRISTOPHER M.

SHORTLE, OF BERNHARDS BAY,

NEW YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO NEWKiRK-GLASS COMPANY, OF PlERRE, SOUTH DAKOTA, A {WRPORATION OF SOUTH DAKOTA.

PRQGEQS FOR DRAWING SHEET-GLASS- Specification of Letters Patent.

Pa'tehted Jan. 8, 1907.

Application filed August 19, 1904- Serial No. 221,481-

To aZZ whom it may concern: I

Be it known that we, Jernus Gnoncn, a resident of Wilcox, in the county of Elk and State of Pennsylvania, and CHRISTOPHER M. SnonrLE, a; resident of Bcrnhards Buy, in the county of ()swego and State of New York, citizens of the United States, have invented certain new and useful improvements in Processes for Drawing Sheet-Glass; and we do hereby declare that the following is a. full, clear, and exact description thereof, reference being had to the accompanying drewings, end to the letters of reference marked thereon, which form it part ol this specification.

This invention reletes to a novel process for drawing sheet-glass from molten glass. Said process follows in its general steps the process disclosed in the prior United States Letters Patent to tleorge and fiShortle, granted on the 7th day oi February, .1899, No; 618,861, wherein the margin oi a sheetunaterialbaitis submerged in a'body oi molten glass and is thereafter drawn upwardly with a thin iilni of glass clinging thereto, which burdens as it merges from the said body of molten glass to constitute e sheet of glass.

The object of the invention is to, provide a process of drawing sheet gluss whereby is overcome the tendency of the sheet to narrow or taper at its side margins or the side margins of the sheet to become irregular in contour or thickness as the sheetis drawn upwardly, and thus produce a sheet of glass of uniform width and with smooth evenlydisposed side margins,

in the practice of our novel process the result ebove rcferred to is attained by maintaining the margins of the him of molten glass as its rises or'is drawn upwurdly from the body of molten glass in contact with verticel surhiccs which rise from the said body of molten glass, the said vertical surfaces being heated to a temperature approxinuttir that. of the molten glass, so that the glass at the edges ol the sheet or lllm will remain heated and will adhere or cling to said vertical sur faces while said margins are tossing said surfaces, and the margins ol" tlic him or sheet will not harden unlil they have passed iron] 01' risen ahove the same. We have found that by drawing the sheet or lilm upwardly i come the tendency of the sheet to narrow, v

but also prevents the margins from becoming l of the sheet.

The vertical surfaces upwardly in contact with which the margins of the sheet or film of glass are drawn may be the inner faces of the heater or pot from which the glass is drawn or may he projections from the walls of said llouter or pot. The margins of the sheet and the said vertical surfaces are he t suitably heated to maintain the glass at t 1e margins of the sheet or lilm at such consistency that it will adhere to the said vertical surfaces. Such heat may be derived from the natural arrangement of the furnace, or specially-erranged auxiliary heating means may he em ployed.

1n the drawings we have shown a form of apparatus which embraces as a part thereof a self-feeding drawing-pot,- which is arranged in the nose of the furnace and is supplied with molten glass from the furnace through specially-constructed conduits or passages that open in the ct at the bottom thereof and have shown an apparatus in which the sheet is drawn directly from the molten glass in the nose of the furnace.

As shown in the drawings, Figure 1 is a fragmentary sectional view of a furnace and its nose, showing therein a pot from which the gloss sheets are drawn, the means for feeding glass to said pot from the furnace, and means for maintaining the molten glass in the feeding-pot heated. Fig. 2 is a horizontal section taken just beneath the cover or arch of the nose. Fig. 3 is a vertical section taken longitudinally through the melting-pot. Figs. 4 and 5 illustrate a construction designed for drawing the sheets dircctl} from the molten glass in the nose of the lurnacc. Fi 6 is an enlarged detail section, partly bflfiflll away, illustrating more clearly the relation of the margins of the sheet to the vertical surface upwardly in contact with which they are drawn. Fi s. 7 and 8 are horizontal sections taken on Tiucs 7 7 and S 8, respectively, of Fig. 6.

ii nzaim :1

i amp l 1 overlapping i'elal'ion (in of film pot, SK) as m pivvvn from the nil-01101 ml lllO nose top l1 idling l uyon llie sliwi as it i.--; mi from ll As heroin slimvn. 33m in l the (and walls Hill 2 lECtli/Ml to niriiliimi-in the side margins the, liln clllQQlS lit small a umsistency m; to i 1 mid. vertical Sl laces while passing Jy lml 'lii2;3; 01* mainm-ining lw 10/35 and. 'g'irmlucing n'iargins of me, the. 05' the pu mn'e to liltl li'lil ill the said vertical l sun 2100s: and margins a l the SlIG l ill-11S limit-9d yply of him igli t-lw ing bluisu mcml l gradualLlT i lllili'liil pipes and tlil'eciiiacl uponwi toward Vl i 7 m" the Slzlilfi Will li 11 oil-n meet '1 lie proper gmdualion al i in": fil'ul wall of the pol. sown Hallie margins 0i film-sheet leave sail l. sui'izu of El a encl- .ieneu sufliciontl walls oi l llC pot they my; l

slie t. The

mininglips c m) ills (":n' ,l'i; w pot shiiilal all ii HMS) of i sheet D from film (lii'QlJi? he the fummw. The iiml'ti-n poi; [mm tlii: lU'lllElCf) lliimi g suitable CJiMlUl wliii i mace below the l0 of this .ltoiii lii through {low 0f molly may be comm. in film use 4 valve 0n n sliding in. Hull. The ass in i l) to Ullbl'l flowing consi the branches 21 a 02 a, e exteiic'ling tin-oil; 1 While the lflllllillih extend 'tlil k llElCll pi} es (2 a are pro 'aml i'egulu'iling valves a 6 and the E i also provide-i will: cut eil valve l? designate {tapes wlncl i z are filled with e iulz tiiig cooling medium which acts to (wi l; heal l'rozii L 16: l

the l'lii'inmq' She li; ll the labial Y upwarllly l'mnl t. molten. glass vi 1 dram i iixl arch cool and I aim than llmo 01' the cli'zaiving 0;; Union is begun The pl 159 urementlsli by which 1;

so as to allowll'ic l(W f0l Qdgn'pl' the bait to be i freely into and viifilidii'zmqi lawn Mm j l 1WiLl'QllY-OfibGUClillgPNiitBCllOIlS C, on. the inl net ends ol which are formed said SUTlzHCS. Said vertical surfaces extend. a, dish-mm: 2LbOVQLllG level of film :nwllmn glass in i'liu pot and 1110 "parallel Willi each other iluiil surfaces and the margins of film sheet we willi iii'MfCll -iiili) suitable chamber louaturl (Not herein the manner In which ari'mfimi'ig sneetloli .molien from l "ins becoini'n m haw slimi'ii C mwli min the shew is clmwn. diiectly (3;. ill (jllli 'n ll. I

ml l is i'x istructiim "W6 Untamed in ib'i 1', with the exceplo, [lie new and lSpi'O- wlw'rslay i is positively simiimgerecl to correspond with the "FLA of the limiter, glass. Said] :onstiriic- Lion consists of mane-filed vertical end and side walls G Gig 1 actively, which. dip at edges iilw the izwlton glass conllw 11035;- imd T156 at their upper the level of the top imll 0i llie npse. 'llse 0f the floater ax s provided their lowe: ea with lllvlfflfillyfimendillg l Angus g r The flanges g of aha side Walls I vonst'tutc ledges on which a? .supported cooling-pipes F. The inner laces of? the llzmgfis g of slim and walls above the iiiolten wonstitule the vertical surlwies g D m: iilm cling 01' adhere, said siuimcirs g? cm'zaspomlri'ig fl lllli surfaces C oi: the pol, slwwi'i m the prev ously-- l05cribei figures. The,

walls G G protect me rising sheet from the umi ml which the Un'lTglBS oi the rising Shea the walis thereof that rest on said frame. The frame H is raised and lowered to raise and lower the floater by means of levers I, prvoted between their ends to standards I, rising from the upper wall of the nose and connected at their inner ends with the frame and piorided at their outer ends with pivoted sleeves i, which are screw-threaded to receive vertical rotative screw-shafts P. Said shafts are provided with hand-wheels 1-. B rotation of the shafts I the levers are oscillated ontheir axes and the floater raised and lowi ered, de ending upon the direction of rota i tion of tii e shaft. i We claim as our invention'- l 1. The improvement in the process of drawing glass sheets from a body of molten glass which consists in maintaining the margins of the sheet or film as it isdrawn upwardly from the body of molten glass in contact with vertical surfaces rising from the l body of molten gIass'WhiIemaintaining said surfaces and the margins of the sheet or film i l at such temperature as to cause said marginsto clin to said surfaces in passing the same.

2? T e improvement in the process of 1 drawing glass sheets-from a body of nioiten diated heat and glass which consists in the formed. sheet from the direct action of ramaintaining" the margins of the sheet or film as it is drawn upwardly from the body of molten glass in contact with vertical surfaces rising from the body of molten glass while maintaining said surfaces and the margins of the sheet or film at such temperature as to cause said margins to cling to said surfaces in passing the same. v

In testimony that I claim the foregoing as my invention I affix my si nature, in the presence of two Witnesses, this 18th. day of July, A. D. 1904. ,i

t JAPHUS j GEORGE. Witnesses:

F. W. ALDRICH, S. G, LATTA.

In testimony that I claim the foregoing as my invention I affix my signature, in the presence of two Witnesses, this 29th day of July, A. D. 1904.

CHRISTOPHER M. SHORTLE.

Witnesses: Y

M. M. GALLAGHER, FRANK PEACHIN.

protecting the body of 

